发明授权
- 专利标题： Transmitting/receiving system having digital switching network
- 专利标题（中）： 具有数字交换网络的发射/接收系统
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申请号： US16578申请日： 1993-02-10
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公开(公告)号： US5319640A公开(公告)日： 1994-06-07
- 发明人: Hiroshi Yamasaki , Yuji Maeda , Shigehiko Yazawa
- 申请人： Hiroshi Yamasaki , Yuji Maeda , Shigehiko Yazawa
- 申请人地址： JPX Kawasaki
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JPX Kawasaki
- 优先权： JPX2-044607 19900227
- 主分类号： H04Q3/42
- IPC分类号： H04Q3/42 ; H04M1/00 ; H04M3/00 ; H04M3/42 ; H04M7/00 ; H04Q3/62 ; H04Q11/04 ; H04J3/12
摘要：
Transmitting/receiving system includes a plurality of analog junction lines and analog tie trunks provided at two ends of the analog junction lines. The PBX is provided with an analog junction line-ISDN converting unit. The analog junction line-ISDN converting unit is operative to transfer B-channel signals on a first analog junction line through the PBX network and the analog tie trunks and to transfer D-channel signals on a second analog junction line.